water butterfly valve: Size : 1" to 24" Body: Cast iron,Ductil iron,Carbon steel,S.S304,S.S316Disc : Ductil iron,S.S304,S.S316 Casting ... Iron Water Butterfly Valve:1,30years focus on QA2,decades experience ... of Canton Fair3,ISO 9001 2000Size : 1" to 24"Material:Body: Cast iron,Ductil iron,Carbon steel,S.S304,S.S316Disc : Ductil ...